993994873 has 4 divisors (see below), whose sum is σ = 994065408. Its totient is φ = 993924340.

The previous prime is 993994847. The next prime is 993994877. The reversal of 993994873 is 378499399.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 378499399 = 19 ⋅19921021.

It is a cyclic number.

It is not a de Polignac number, because 993994873 - 2¹³ = 993986681 is a prime.

It is a super-2 number, since 2×993994873² = 1976051615100572258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (993994877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6073 + ... + 44998.

It is an arithmetic number, because the mean of its divisors is an integer number (248516352).

Almost surely, 2^993994873 is an apocalyptic number.

It is an amenable number.

993994873 is a deficient number, since it is larger than the sum of its proper divisors (70535).

993994873 is a wasteful number, since it uses less digits than its factorization.

993994873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70534.

The product of its digits is 13226976, while the sum is 61.

The square root of 993994873 is about 31527.6842314814. The cubic root of 993994873 is about 997.9942707398.

The spelling of 993994873 in words is "nine hundred ninety-three million, nine hundred ninety-four thousand, eight hundred seventy-three".